package com.android.qjpmc.widget;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.util.Log;

import com.android.qjpmc.widget.mvvm.view.AppActivityManager;
import com.android.qjpmc.widget.utils.CommonUtils;
import com.android.qjpmc.widget.utils.FileUtils;
import com.android.qjpmc.widget.utils.UIUtils;
import com.umeng.analytics.MobclickAgent;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;


/**
 * Created by zsq on 2018/7/30.
 */

public class ExceptionHandler implements UncaughtExceptionHandler {
    public static final String TAG = "CrashHandler";
    // 系统默认的UncaughtException处理类
    private UncaughtExceptionHandler mDefaultHandler;
    // CrashHandler实例
    private static ExceptionHandler instance;
    // 程序的Context对象
    private Context mContext;
    // 用来存储设备信息和异常信息
    private Map<String, String> infos = new HashMap<>();

    // 用于格式化日期,作为日志文件名的一部分

    /**
     * 保证只有一个CrashHandler实例
     */
    private ExceptionHandler() {
    }

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static ExceptionHandler getInstance() {
        if (instance == null)
            instance = new ExceptionHandler();
        return instance;
    }

    /**
     * 初始化
     */
    public void init(Context context) {
        mContext = context;
        // 获取系统默认的UncaughtException处理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 设置该CrashHandler为程序的默认处理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        Context context = UIUtils.getContext();
        if (context == null)
            context = mContext;
        if (context != null)
            MobclickAgent.reportError(context, ex);
        if (!handleException(ex) && mDefaultHandler != null) {
            // 如果用户没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
           /* try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                Log.e(TAG, "error : ", e);
            }
            // 退出程序
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);*/
            AppActivityManager.getAppActivityManager().finishActivity();
        }
    }

    /**
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false.
     */
    public boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        if (CommonUtils.isAppDebug()) {
            // 收集设备参数信息
            collectDeviceInfo(mContext);
            // 使用Toast来显示异常信息
/*
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.错误信息保存在该目录" + getSDPath(),
                        Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();
*/
            ex.printStackTrace();
            // 保存日志文件
            //    saveCatchInfo2File(ex);
        }
        return true;
    }

    /**
     * 收集设备参数信息
     *
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx) {
        Log.i(TAG, "收集设备信息");
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),
                    PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                infos.put("versionName", String.valueOf(pi.versionName == null ? "null"
                        : pi.versionName));
                infos.put("versionCode", String.valueOf(pi.versionCode));
            }
        } catch (NameNotFoundException e) {
            Log.e(TAG, "an error occured when collect package info", e);
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                Log.d(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return 返回文件名称, 便于将文件传送到服务器
     */
    private String saveCatchInfo2File(Throwable ex) {
        OutputStream fos = null;
        StringBuilder sb = new StringBuilder();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "\n");
        }
        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        String result = writer.toString();
        sb.append(result);
        try {
            String fileName = "crash-" + getCurrentTime() + ".txt";
            if (Environment.getExternalStorageState().equals(
                    Environment.MEDIA_MOUNTED)) {
                File dir = FileUtils.getExceptionFolderFile();
                String path = dir.getPath();
                if (!dir.exists()) {
                    // 创建此抽象路径名指定的目录，包括所有必需但不存在的父目录。
                    dir.mkdirs();
                }
                File exFile = new File(dir, fileName);
                if (!exFile.exists()) {
                    exFile.createNewFile();
                }
                fos = new FileOutputStream(exFile);
                fos.write(sb.toString().getBytes());
                // 发送给开发人员
                sendCrashLog2PM(path + fileName);
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);

        } finally {
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

    /**
     * 将捕获的导致崩溃的错误信息发送给开发人员
     * <p/>
     * 目前只将log日志保存在sdcard 和输出到LogCat中，并未发送给后台。
     */
    private void sendCrashLog2PM(String fileName) {
        if (!new File(fileName).exists()) {
//            Toast.makeText(mContext, "日志文件不存在！", Toast.LENGTH_SHORT).show();
            return;
        }
        FileInputStream fis = null;
        BufferedReader reader = null;
        String s = null;
        try {
            fis = new FileInputStream(fileName);
            reader = new BufferedReader(new InputStreamReader(fis, "GBK"));
            while (true) {
                s = reader.readLine();
                if (s == null)
                    break;
                // 由于目前尚未确定以何种方式发送，所以先打出log日志。
                Log.i("info", s);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally { // 取消流
            try {
                reader.close();
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }


    private String getCurrentTime() {

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-hh-mm:ss", Locale.getDefault());
        return format.format(new Date());
    }


}
